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Spirent KB Article
Doc ID: FAQ19920
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Spirent TestCenter: On 800G and 400G appliance, is PPM adjustment supported per port when channelized to different speeds?
B1-800G - 800G appliance
PX3-QSFPDD-8 - 400G appliance
PPM adjust is per port group. In this case, 2x400G belongs to the same port group. Therefore one setting applies to both ports.
PPM adjust per QSFP-DD connector. This means per 400G port. And per port group at sub-rates (i.e. all 4 ports of 100G at once).
Lets say you have a 400G port that you set the speed to 100G which will give you four x 100G ports.
If you set the PPM on a single 100G port, the other three should change to the same value.
Product : Spirent TestCenter,PGA